curl --request GET \
  --url 'https://openapi.msu.io/v1rc1/market/valuation/item?itemId=0&range=90' \
  --header 'Content-Type: application/json' \
  --header 'x-nxopen-api-key: YOUR_API_KEY'

const response = await fetch('https://openapi.msu.io/v1rc1/market/valuation/item?itemId=0&range=90', {
  method: 'GET',
  headers: {
    'Content-Type': 'application/json',
    'x-nxopen-api-key': 'YOUR_API_KEY'
  }
});
const data = await response.json();

import requests

url = "https://openapi.msu.io/v1rc1/market/valuation/item"
params = {
  "itemId": 0,
  "range": 90
}
headers = {
  "x-nxopen-api-key": "YOUR_API_KEY"
}

response = requests.get(url, params=params, headers=headers)
data = response.json()

{
  "success": true,
  "data": {
    "avgBottomPrice": 0,
    "avgTopPrice": 0,
    "tradeCount": "string",
    "date": "string"
  }
}